MAX704R Maxim Integrated Products, MAX704R Datasheet - Page 4

• Manufacturer Part Number: MAX704R
• Description: P Reset ic With Watchdog And Battery Switchover
• Manufacturer: Maxim Integrated Products

3.0V/3.3V Microprocessor Supervisory Circuits
ELECTRICAL CHARACTERISTICS (continued)
(V
5.5V for the MAX690R/MAX704R/MAX80_R; VBATT = 3.6V; T
Note 1: V
Note 2: Tested at VBATT = 3.6V, V
Note 3: Leakage current into the battery is tested under the worst-case conditions at V
Note 4: Guaranteed by design.
Note 5: When V
Note 6: When VBATT > V
Note 7: V
Note 8: The reset threshold tolerance is wider for V
Note 9: The leakage current into or out of the RESET pin is tested with RESET asserted (RESET output high impedance).
4
PFI Input Threshold
PFI Input Current
PFI Hysteresis, PFI Rising
PFI Input Current
–
M
–
M
–
M
–
M
WDI Input Threshold
Watchdog Timeout Period
WDI Pulse Width
CC
WDI Input Current
—
—
—
—
R
R
R
R
–
–
–
–
_______________________________________________________________________________________
= 3.17V to 5.5V for the MAX690T/MAX704T/MAX80_T, V
Input Threshold
Pulse Width
to Reset Delay
Pull-Up Current
PARAMETER
(MAX704_/806_), PFI functionality, state of
VBATT = 3.6V, and V
V
VBATT= 1.0V.
has a small 25mV typical hysteresis to prevent oscillation. For V
voltage on VBATT.
V
switchover occurs 200ms prior to reset.
prevents internal oscillation.
CC
CC
OUT
CC
supply current, logic input leakage, watchdog functionality (MAX690_/802_/805_/804_),
= 1.9V.
occurs at the exact voltage that causes
switches from VBATT to V
SW
> V
CC
CC
> VBATT, V
> V
CC
SYMBOL
SW
V
V
= 5.5V. The state of
t
V
t
t
V
V
V
PFH
MR
MD
WD
PFT
IH
IH
IL
IL
CC
, V
OUT
OUT
= 3.5V and 0V. The battery current will rise to 10µA over a narrow transition window around
CC
V
V
MAX690_C/E, MAX704_C/E, MAX80_ _C/E
MAX690_M, MAX704_M, MAX80_ _M
V
MAX690_C/E, MAX704_C/E, MAX80_ _C/E
MAX690_M, MAX704_M, MAX80_ _M
MAX704_/MAX806_ only
MAX704_/MAX806_ only
MAX704_/MAX806_ only
MAX704_/MAX806_ only,
MAX690_/MAX802_/MAX804_/MAX805_ only
0V< V
V
MAX690_/MAX802_/MAX804_/MAX805_ only
remains connected to V
remains connected to V
CC
PFI
CC
CC
when V
< 3.6V
falling
< 3.6V
< 3.6V
CC
CC
< 5.5V
CC
–
R
—
–
rises above the reset threshold, independent of VBATT. Switchover back to
–
E
R
R
—
—
—
rising than for V
S
E
E
—
—
—
E
S
S
—
—
—
A
T
E
E
–
—
—
= T
MAX802_C/E, MAX804_C/E,
MAX806_C/E
MAX690_/MAX704_/MAX805_
MAX690_C/E, MAX704_C/E,
MAX80_ _C/E
MAX690_M, MAX704_M, MAX80_ _M
MAX690_C/E, MAX802_C/E,
MAX804_C/E, MAX805_C/E
MAX690_M, MAX802_M,
MAX804_M, MAX805_M
MAX690/MAX802/MAX804/
MAX805 only
CC
T
T
–
–
CONDITIONS
(MAX690_/704_/802_/806_), and RESET (MAX804_/805_) tested at
to go high (on the MAX804_/805_, RESET goes low); however
MIN
or RESET and
= 3.02V to 5.5V for the MAX690S/MAX704S/MAX80_S, V
CC
CC
to T
–
M
—
R
until V
until V
–
CC
MAX
= 0V, V
CC
falling to accommodate the 10mV typical hysteresis, which
; unless otherwise noted. Typical values are at T
CC
< 1.75V (typ), V
CC
–
P
—
drops below VBATT. The V
drops below the battery switch threshold (V
CC
F
—
O
–
= 3V
is tested at V
CC
= 5.5V, VBATT = 1.8V and at V
OUT
switches to VBATT regardless of the
CC
0.3 x V
0.3 x V
1.212
1.187
-500
-500
1.12
MIN
100
100
-25
-25
-10
20
= V
-1
–
M
—
CC
R
CC
CC
–
functionality
min.
CC
1.237
1.237
TYP
0.01
0.01
1.60
10
10
20
60
60
20
-to-VBATT comparator
2
2
2
2
0.7 x V
0.7 x V
1.262
1.287
MAX
2.24
500
500
500
350
25
20
25
25
10
CC
1
CC
CC
A
CC
= 2.72V to
SW
= +25˚C.)
UNITS
= 1.5V,
).
sec
mV
nA
nA
µA
µA
ns
ns
ns
V
V
V